Dust-collector.



Nu. 648,575. Patented May I, I900. G. D. SCHEIFFLEB.

DUST COLLECTOR.

A (Application'filed May 1, 1899.) (No Model.) r 2 Sheats$heet I.

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No. 648,575. Patented May I, I900. G. D. S'CHEIFFLER.

DUST COLLECTOR.

(Application filed May 1, 1899 (No Model.) 2 sheets sheet 2.

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UNITE STATES PATENT ()FFICE.

GEORGE D. SOHEIFFLER, OF JACKSON, MICHIGAN.

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SPECIFICATION forming partof Letters Patent No. 648,575, dated May 1,1900.

Application filed May 1, 1899. Serial No- '715,139. (No model.)

To all whom, it may concern.-

Be it known that I, GEORGE D. SOHEIFFLEB, a citizen of the UnitedStates, residing at Jackson, in the county of Jackson and State ofMichigamhaveinvented certain new and useful Improvements inDust-Collectors; and I do hereby declare the following to be a full,

. clear, and exact description of the invention,

. claims.

such as will enable others skilled in the art to which it appertainsto'make and use the same. My invention relates to improvements in dustcollectors, and more Particularly to such devices having a moving weborscreen of suitable material through which the air passes and by whichthe particles of matter suspended in the air are intercepted.

The objects of myinvention are to more effectually prevent air orparticles of solid matter from escaping over the edge of the screen, toevenly distribute the air-current to the screen, to separate the heavierand coarser particles of matter from the finer ones and discharge thesame from a separate conveyer, to separate the coarser particles ofmatter from the air before it reaches thescreen, and to provide thedevice with certain other new and useful features hereinafter more fullydescribed, and particularly pointed out in the My invention consists,essentially, in the arrangement of thefcontinuous web of materialforming the screen'in a series of parallel horizontal planes withsuitable rolls and pro-j pelling mechanism, providing at each edge ofthe screen a double air-stop with dead-air space between the same andmeans for adjusting the air-stop to keep the same tight,

a separating and distributing chamber at one end of the machine providedwith deflectingboards by which the air is distributed to the spacesbetween the layers of the screen and the larger particles of matterseparated from the air before it reaches the screen, a brush in aseparate chamber to remove the dust from the screen, and separateconveyors for the separating-chamber and the brush-charm her, as willmore fully appear by referenceto the accompanying drawings, in which-Figure 1 is a side elevation of a device embodying my invention; Fig. 2,alongitudinal vertical section of the same on the line 2 2 of Fig. 3;Fig. 3, a transverse vertical section of the same on the line 3 3 ofFig. 2; Fig. 4., an enlarged detail of a portion of Fig. 3, and Fig. 5an enlarged detail of a portion of Fig. 2.

Like letters refer to like parts in all of the figures.

A represents a suitable rectangular casing having a seriesofhorizontally-extended openings A and vertically-extended openings A forthe escape of the air,-and B is a chamber at one end of the casing A,which chamber receives'the dust-laden air in a downwardly-flowingcurrent. Below this chamber 13 is a conveyer F to remove the coarsermaterial that is separated from the air. To effect this separation anddistribute the air evenly to the screen, oppositely-im clined deflectorsO are provided in the chamber B. These deflectors are arranged atintervals in pairs with the apex of each pair up= ward and in the middlevertical plane of the chamber and. extending transversely across thesame. Intermediately between these pairs of deflectors O are otherdeflectors C at opposite sides of the chamber B and having their outeredges elevated and inwardly-inclined sides. The air-current istherebyalternately deflected outwardly by the deflectors G and inwardlyby the deflectors 0, whereby said current is broken up and its inertiachecked and the air caused to flow laterally and equally into thealternate spaces between the parallel portions of the screen. At thesame time thelarger particles in the air become separated from the sameand passing downward escape through a flap-valve D and are carried outof the machine by the conveyor F.

The screen I consists of anysuitable material through which the air canpass and close enough in its texture to intercept the fine particles ofdust. At each edge of this screen I is a strip of close and strongwebbing I, through which air cannot pass and which serves to stretch andhold the screen flat and smooth. The outer edge of this webbing I isattached toa sprocket-chain J ,which chain serves to move the screen andfurtherstrengthen and stretch the same. This chain, webbing, and screenare extended horizontally in alternate parallel planes Within the casingin 25 1, by way'o'f the' openings AA. [To tighten the screen,'the upperroll-jH-is journaled-in v horizontally-adjustable bones H it The lower,roll H.is preferably usedasa driverto move j provided-withsuitablesprocket-"wheels Kto, engage the'chainiJ. To prevent escape of'air'ordust at'the sides 3 (of thescreemribsN extend inward tro'm the 4 casingat each side of the chain and webbing, {and-to theseribsare securedthe'nrain stop5 .i stripsfR,-with theirjedges close 'to the webl fbi'ng; and rolls and providedwith elastic facings' 1?, of leather,rubber, or other suitable r 1 fmateriahwhichfacingsyieldi'nglyengagethe, Web a'n'dFrOIIs to-s'top-"theair and dust frompassing:; ;Thislalone l find is not. sufficient,

and to furtherinsure this result I place" on f thesestrips Rinwardly-projecting bosses 0,, 4 '1 providedwith'similar facing P,engaging the web, and-also provided with a flexible. edgt ticallybetween these rolls and joined, thus forming a continuous web of muchgreater as many layers as convenient, and near the respective ends ofthe casing contact half way around rolls H and H, arranged in ver-'tical rows and distant from each other about equal to the diameter ofone of the rolls,'the rolls H being in alternate horizontal planes withthe rolls H. The extreme upper and I lower layers of the screen areprolonged beyond the plane of the rolls H and pass over and under rollsH H, being extended verlength compared to the dimensionsof casing closesthe end of the pocket between the upper layer} of the screen and thecasing, and

, partitions E and E stopfoft the air'from the "lowerchan'iber b'elowthescreen. I

air from-the-charnber B passes into each alternate pocket, andthencet-hrough the screen to the i'ntermediatepockets,-whence it escapesthe screen longitudinally, an therolls being to which are attachedauxiliary stop-stripsL',

-ingL,'of cloth or other suitable material, se-

cured to the'face of the strip'L at one edge and having itsfother'edgeinclined inward and resting on the web; This latter I .find veryeffective in preventing the passage of dust. A dead-air chamber is thusformed between the strips R andL, and if any'dust I works through intothis chamber it is car-' ried by the'web and discharged downward at theend toward the chamber B through open- "other ribs N, supportingnarrow-strips M,

ings at the ends of the ribs N. To take up wearand properly adjust thecontact ofthe facing with theweb, I provide at the side of the webadjacent to the escape-openings A provided with elastic facing P andadjust- -ably secured to the ribs'by screws passing through transverseslots in the strips.

, r A rotative brush G is provided to engage A suitable stop L Thus thepassing through the valve D to the conveyer F and alldust adhering tothe'screen being re- "moved by the brush Gand going'tothe con- Iveyer'F, thus efiecting a separation into two grades of. the matterremoved from the air by theTmachine V, 1 l

Any convenient means for rotating the conveyersmay be utilized. 1

"what'I claim, desire tosecureby'Letters To further support :the "screenagainst the pressure of the air passing throughthe same, I 'I- providebridge-bars Qzat intervals, having -rounded edges engaging the screenandextending transversely-acro'ssthe pockets at the driving-roll ofthesc'reen, the brush, and the 1070 I dus'tcollectin g screeniinsaid'casi'n g; webbing attached to each ed geof said screen tostretchgand'gs'trengthen .thegscreemrolls to "support 7 and move :the 7 screen,means for: actuating said rolls,fixed,"stop-stripsengaging one side Jofgihe webbing, adjustable stop-strips opposite the fixed stop-strips,and engaging' the other sideof the webbing, andauxiliary stopstrips,supported atadistance from thefixed [stop-strips and engaging the sameside of the webbing, substantially as described,

.- 2. In a dust-collector, a casing, a'screen adapted-to permit' air topass therethrouglr and to'retain dnst,'webbin g attached to each edge.of the screen to stretch andstrengthen the same, sprocket-chainsattached to the webbing to move-the screen, a series of rolls en gagingthe screenand webbing and having wheelsengaging the chains, fixedstop-strips engaging the webbing at one side, and adj ustablestop-strips engaging the other side of the Webbing, substantially asdescribed.

'3.- In a dust-collector, a casing, a movable dust-collecting screen inthe casing, webbing attached to the edges of the screen to strengthenand stretch the screen, main stop-strips engagingthe webbing nearthe'outer edge thereof, and auxiliary stop-strips, engaging thewebbingnear the inner edge thereof, said auxiliary stop-strips beingeachprovided with a flexible edging attached at one end to the face ofthe strip and having its other edge inclined inward and resting onthe'webbing, whereby a dead-air chamber is formed between the main andauxiliary stop-strips, substantially as described.

4:. In a dust-collector, the combination with a casing, a movabledust-collecting screen in the casing, and means for moving the same, astrip of webbing attached to the respective edges of the screen, ribs onthe casing at each side of the webbing, fixed stop-strips attached tosaid ribs and engaging one side of the webbing near the outer edgethereof, adjustable stop-strips attached to said ribs, opposite thefixed stop-strips, and engaging the other side of the webbing, auxiliarystop-strips, supported at a distance from the fixed stop-strips, andengaging the webbing near its inner edge, and elastic facings on theedges of the various stop-strips, substantially as described.

5. In a dust-collector, a case, a longitudinally-movable screen, webbingattached to the edges thereof, sprocket-chains attached to the webbing,a series of rolls engaging the screen and webbing and havingsprocketwheels engaging the chains, ribs on the case at each side of thechains and webbing and supporting the stop-strips, stationary stopstripshaving elastic edges engaging one side of the webbing, and adjustablestop-strips engaging the other side of the webbing, substantially asdescribed.

6. In a dust-collector the combination of a case, a movable screen inthe case, means for moving said screen, webbing attached to therespective edges of the screen, ribs on the case at each side of thescreen to support the stop-strips, fixed stop-strips at one side of thewebbing, adjustable stop-strips at the other side of the webbing, bosseson the fixed stopstrips, auxiliary stop-strips attached to the bosses,elastic facings on the stop-strips and engaging the webbing, andflexible edgings attached at one side to the auxiliary stopstrips andhaving their free edges engaging the webbing, substantially asdescribed.

7. In a dust-collector a case having inlet and exit openings near itsrepective ends, a series of rolls near each end of the case arranged inparallel vertical planes and alternate horizontal planes, two rollslocated outside the plane of one series of rolls, a continuous screenengaging the rolls and extending in parallel horizontal planes, fixedstop-strips engaging the respective edges of the screen at the sideadjacent to the inlet-opening, and adjustable stop-strips opposite thefixed stopstrips and engaging the other side of the screen,substantially as described.

8. In a dust-collector, a case having an inlet-opening at one end, and aseries of exitopenings in its sides, a series of rolls adjacent theinlet end of the case, and opposite the ends of the exit-openings, aseries of rolls near the other end of the case, and between theexit-openings in the sides of the case, two rolls outside the verticalplane of the lastadjacent to the exit-openings in the case,substantially as described.

9. The combination of a dust-collector having a case, and a movingscreen arranged in alternate parallel planes, the planes of said screenforming pockets alternately open in opposite directions, a casing at theinlet end of the dust-collector case, having a series of openingsopposite the alternate pockets formed by the screen, inwardly anddownwardly inclined deflectors at each side of said chamber andoppositely and downwardly inclined deflectors in said chamber, wherebythe air is distributed equally to said pockets, and the heavierparticles of the dust separated from the air, substantially asdescribed.

10. The combination of a dust-collectorhaving a moving screen arrangedin parallel horizontal planes, said screen forming pockets openalternately in opposite directions, a brush engaging the lower plane ofsaid screen, to remove dust from the same, a casing having inlet andexit openings at its respective ends, a casing attached to the inlet endof same, deflectors in said casing whereby the air is distributed to thevarious pockets formed by the screen, and the heavier particles of dustseparated from the air, and a conveyer below the said deflectors tocarry away the dust so separated, substantially as described.

11. Inadust-collector,acase havingachamber at one end adaptedto receivea descending air-current, and an exit-opening near the other end,amoving screen between said chamber and exit-opening, arranged inparallel horizontal planes, and forming pockets alternately open inopposite directions, a brush and conveyer beneath .said screen andinclosed in a separate compartment, a second conveyer below the chamberand separated therefrom by a valve, outwardly-inclined deflectors insaid chamber arranged in pairs, and at intervals, and inwardly-inclineddeflectors at each side of said chamber, substantially as described.

12. Ina dust-collector, a chamber to receive a downward current of air,oppositely-inclined deflectors in said chamber, a valve at the bottom ofsaid chamber, a conveyer below the valve, an endless moving screenarranged in horizontal parallel planes and ex tended rearwardly andvertically, stop-strips having elastic facings engaging the screen, andauxiliary stop-strips having flexible edg ings engaging the screen at adistance from the first-named stop-strips, a case inclosing the screenand having horizontally-extended In testimony whereof I afiix mysignatnre openings opposite the spaces between thehoriin presence of twowitnesses.

Zontal portions of the screen and. a verticallyt extended opening nearthe vertical pan-tot the GEORGE SC'HEIFFLER' 5' screen, rolls engagingthe screen, a brush be- Witnesses; v

neath the screen, and a conveyer beneath th WM. G. GUTM'AN N;

brush, substantially as described.

OARL' FRANKE.

